Has received specialist instruction from several internationally recognised physicians, including:
- Prof. Dr. habil. J. Breitenfelder (Brakel)
- Prof. Dr. Jürgen Toft (Alpha Clinic Munich, knee specialist)
- Member of the Scientific Council "Orthopaedics Traumatology Rehabilitation"
- J. Czernicki's professional sports qualifications include a third dan in Kyokushin Karate. He has won several international competitions and has also successfully taken part in European and world championships in this discipline.
- He offers a further specialist instruction course in orthopaedic medicine.